MD5 两次加密

1、添加依赖

<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
</dependency>
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
</dependency>

2.加密算法实现

package com.everjiankang.miaosha.util;

import org.apache.commons.codec.digest.DigestUtils;

/**
 * 2次MD5加密
 * @author guchunchao
 *
 */
public class MD5Util {
    
    private static final String    PUBLIC_SALT = "1a2b3c4d5e";
    
    /** step1 将input框输入的明文密码根据公有盐转化为MD5加密密码*/
    public static String inputPassToFormPass(String password) {
        String saltPass = PUBLIC_SALT.charAt(0) + PUBLIC_SALT.charAt(2) + password + PUBLIC_SALT.charAt(5) + PUBLIC_SALT.charAt(4);
        return DigestUtils.md5Hex(saltPass);
    }
    
    /** step2 将根据公有盐转化的MD5加密密码  再根据私有盐进行第二次加密，同时应该在DB中存储私有盐*/
    public static String formPassToDBPass(String formPass,String privateSalt) {
        String saltPass = privateSalt.charAt(0) + privateSalt.charAt(2) + formPass + privateSalt.charAt(5) + privateSalt.charAt(4);
        return DigestUtils.md5Hex(saltPass);
    }
    /** 将step1 和 step2 结合起来进行封装*/
    public static String inputPassToDBPass(String inputPass,String privateSalt) {
        return formPassToDBPass(inputPassToFormPass(inputPass),privateSalt);
    }
    
    public static void main(String[] args) {
        System.out.println(inputPassToFormPass("123456"));
        System.out.println(formPassToDBPass("123456","xiaochaoaidami"));
        System.out.println(inputPassToDBPass("123456","xiaochaoaidami"));
    }
}